Subject: Re: (Avionics) How can this circuit produce an "inductive surge"?
Date: Fri, 27 Sep 2002 14:23:04 -0600
NNTP-Posting-Date: 27 Sep 2002 20:23:34 GMT
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David Lesher wrote:
> MikeM writes:
> >2. One of the field slip ring brushes is grounded to the alternator
> > frame, hence the VR modulates the field current by breaking
> > the path between the field switch and the non-grounded brush.
> > Only a few MOPAR alternators used low side switching as depicted
> > in your diagram. I've never seen one of these on an aircraft.
> Sorry to disagree on this minor point. But both LOTS of Mopars and
> GM's used low-side regulation. So did my Datsun, which now has a
> Mopar regulator on the firewall now....
The alternators used on Cessnas from ~1969 until the 1980s were
Prestolite(Ford). I have seen some Chrysler alternators on early
Pipers, but they used high side regulation, just like the Ford
units... The Presotite alternator brings out both brushes to separate
terminals on the rear of the alternator, so techically you could
hook it up either way. However, the Cessna Voltage Regulator is
set up for high side regulation.
My point specifically had to do with aircraft, not